Resolver for detecting rotational angle of motor
A resolver includes a resolver rotor that is provided in an outer circumference of the motor shaft and rotates integrally with the motor shaft, a resolver stator that has a plurality of coils and surrounds an outer circumference of the resolver rotor such that a rotational angle detection gap is provided between the outer circumference of the resolver rotor and the resolver stator, a housing that houses the resolver rotor and the resolver stator and has an opening for extracting wires of the coils in an outer circumference side of the resolver stator, a wire harnessing member provided to extend from the resolver stator to an outer side of the housing through the opening and consolidates wires of a plurality of the coils, and a cover member that covers a gap between the opening and the wire harnessing member.
1. A resolver that is configured to detect a rotational angle of a motor shaft, comprising:
a resolver rotor that is provided in an outer circumference of the motor shaft and rotates integrally with the motor shaft;
a resolver stator that has a plurality of coils and surrounds an outer circumference of the resolver rotor such that a rotational angle detection gap is provided between the outer circumference of the resolver rotor and the resolver stator;
a housing that houses the resolver rotor and the resolver stator and has an opening for extracting wires of the coils in an outer circumference side of the resolver stator;
a wire harnessing member provided to extend from the resolver stator to an outer side of the housing through the opening and consolidates wires of a plurality of the coils; and
a cover member that covers a gap between the opening and the wire harnessing member,
wherein
the opening is directed to a radial direction,
the cover member has a base portion having a curved surface in an arc shape that has a dimension longer than a dimension of the opening in a circumferential direction, and
the cover member is configured to swing together with the wire harnessing member in the circumferential. direction so as to cover the opening regardless of a circumferential position the wire harnessing member.
2. A resolver that s configured to detect a rotational angle of a motor shaft, comprising:
a resolver rotor that is provided in an outer circumference of the motor shaft and rotates integrally with the motor shaft;
a resolver stator that has a plurality of coils and surrounds an outer circumference of the resolver rotor such that a rotational angle detection gap is provided between the outer circumference of the resolver rotor and the resolver stator;
a housing that houses the resolver rotor and the resolver stator and has an opening for extracting wires of the coils in an outer circumference side of the resolver stator;
a wire harnessing member provided to extend from the resolver stator to an outer side of the housing through the opening and consolidates wires of a plurality of the coils; and
a cover member that covers a gap between the opening and the wire harnessing member, the cover member comprising:
a base portion having a curved surface in an arc shape and a notch having a dimension matching an external dimension of the wire harnessing member; and
an abutting portion provided to extend from an outer edge of the notch to an outer side of the base portion in a radial direction and abuts on three sides of the wire harnessing member.
3. The resolver according to claim 2 , wherein the curved surface has a dimension longer than a dimension of the opening in a circumferential direction, and the cover member is configured to swing together with the wire harnessing member in the circumferential direction so as to cover the opening regardless of a circumferential position of the wire harnessing member.
4. The resolver according to claim 3 , wherein the dimension of the base portion in an axial direction matches a dimension of the opening in the axial direction.
5. The resolver according to claim 2 , wherein the dimension of the base portion in an axial direction matches the dimension of the opening in the axial direction.